Self-twilling jacquard machine for looms



June 4, 1929. s, w, DOUGLAS ET AL 1,716,263

SELF TWILLING JACQUARD MACHINE FOR LOOMS Filed July 29,. 1927 2 Sheets-Sheet 1 June 4, 1929. s. w. DOUGLAS T L SELF TWILLING JACQUARD MACHINE FOR LOOMS T iled July 29, 1927 2 Sheets-Sheet 2 machines,

twilling bar,

are left down,

plane also brings hooks out of every Patented June 4, 1929.

SAlvIUEL WALTER DOUGLAS, OF

LUIRGAN, AND JOHN GREGG AND MATTHEW S ILCOCK, OF BELFAST, IRELAND.

SELF-TWILLING JACQUARD MACHINE FOB LOOMS.

Application filed July 29, 1927,

This invention relates to self twilling jacquard machines, its object being to provide improvements therein.

With the ordinary selftwilling jacquard when the griffe blades in any row are inclined and the ordinary hooks are positioned above them, the twilling hooks are clear. When a peg on the twilling barrel comes into contact with its corresponding however, it moves the griffe blades connected therewith into the vertical position, and, on the head of the machine being raised, the rows of ordinary hooks corresponding to the said vertical griffe blades this action taking place irrespective of whether the said ordinary hooks have been left on or pushed off the griife blades by the ordinary pattern cards. The movement of the grilfe blades into the vertical them below the twilling hooks in the rows immediately in front thereof, whereby, when the head of the machine rises as aforesaid, all the ordinary hooks in each of the said rows are lifted whether or not they are left on by the pattern cards. In an eight leaf twill, the efiect of this action is such that, when any of the twilling bars move the grifie blades clear of the ordinary hooks, it is ensured that one row of ordinary eight rows will be left down, with the result that the same proportion of warp threads selected by the pattern cards and hooks are left down also, so as to form the warp portion of the figure. On the other hand, the griife blades, moved by the twilling bar into the vertical plane, lift the twilling hooks and thereby raise one out of every eight rows of ordinary hooks, harness and warp threads, so that this same proportion of warp is lifted from among the mass of warp threads selected by thepattern cards so as to produce the weft figure. The same sequence is repeated on the next pick of weft.

The effect of the usual twilling mechanism as above described is to produce a satisfactorily bound edge on one side of figure but not on the other where what is known as floating ends are left, making an imperfect cloth.

According to the present invention, we provide a self twilling jacquard machine having primary twilling, bars whereby griife blades corresponding to any of the rows of ordinary hooks can be moved clear thereof, twilling hooks connected to cross bars where- Serial No. 209,248, and in Great Britain March. 16, 1927.

by the ordinary hooks are carried when not supported by the grilfe blades, twilling blades, and secondary twilling bars adapted to move the twilling blades into or out of position beneath the twilling hooks. Preferably, the secondary twilling bars are inde-. pendently operable by means of pegs or tappets on a rotating barrel or barrels driven by gearing from'the usual tappet; shaft of the jacquard machine. Eight of these independently controlled secondary twilling bars may be arranged on each side of the jacquard machine, being situated transversely of, and above, the grifie blades, many twilling blades as hooks on the machine. duplicate tappet barrels are provided at each side of the machine. The tappetscan be arranged, to move the twilling blades to'twill the ground of the cloth from left to .right, while the twill on the pattern is worked from right to left, or vice versa.

The secondary twilling bars,

there are twilling Preferably also,

operated as described, move the required twilling blades 1 below desired twilling hooks, so that, when the machine head rises, it will carry with it the required twilling hooks and corresponding rows of ordinary hooks'to obtain the de sired twilling or binding effect on the cloth. The invention will now be described, by way of example, with reference to the ac-. companying drawings, whereon:-' Fig. 1 is a plan view of the top portion of a Bessbrook self twilling jacquard machine showing the invention applied thereto;

. Fig. 2 is a longitudinal elevation;

Fig. 3 is a cross sectional elevation on the line 3-3 (Fig. 1). I

Referring to the drawings;

The primary twilling bars 1 (Fig. 2) have notched projections '2 on their under edge-so that in known manner they can be operated for the purpose of turning the griffe blades 3 from the inclined to the vertical position, the said blades 3, when inclined, being adapted to engage the ordinary hooks 4 as the head of the machine rises. The twilling hooks 5 are adapted to be lifted by separate twilling blades 6, controlled by secondary twilling bars 7 and arranged above the twilling blades 6. The twilling bars 7 are operated by pegs or tappets 8 on barrels 9 secured on a tappet shaft 10 arranged above the usual tappet shaft 11 and'drive'n therefrom by gearing 12. The tappets 8 can be arranged to give and controlling as hooks 5 at known manner, every ordinary hook 4 1s formed at the bottom with a depth of a shed.

machine rises, it

ling hooks 5 thereby raismg the bar13 and the cloth.

8 can bearranged' to move the twilling blades 6 to twill the ground of the cloth from left to right, while the twill on the pattern'is worked from right to left, or vice versa.

hen the tappets 8 come into contact with any one of the'secondary twilling bars 7, it is pushed forward and'turns the correspond ing twilling blade 6' from the inclined'to the vertical position, underneath the twilling each side of the machine. In

closed loop 14 the length of which must equal, at least, 7

the

f are not in action, each row thereof is supported by a bar 13 attached to the bottom of the twilling hooks 5. In Fig. 2 of the drawing, we have shown one of fin side elevation. When the head ofthe will carry with it the twilthe required row of'ordinaryhooks 4;

The twilling bars 7 operated as described, move the required twilling blades 6 below desiredtwilling hooks 5. For example, by re? ferring to'Figs. land 2 it will be clear that the pushing over of the twilling blade 6 by the secondary twilling bar 7 moves it into operative position below the twilling hooks 5. lVhen the machine head rises it will carry with it the required twilling hooks 5 and cor responding rows of ordinary hooks 4 to obtain the desired twilling or binding effect on As shown in Figs; 1 and 2 the twilling hooks 5 will lift the fifth row of ordinary hooks 4. Y

" In an ordinary self twilling jacquard machine, the twilling hooks are lifted inthe following order: first hook fourth' hook seventh hooksecond hook-fifth hook eighth hookthird hook-sixth hook. Each of these twilling hooks lifts'the row of ordinary hooks immediately behind it, and thus the order in which the rows of ordinary hooks are lifted is as follows: second row fifth roweighth rowthird rowsixth row-first 'rowfourth row-seventh row,"

This of the cloth and, to obtain thesame, we employ the means hereinbefore set forth. By this means, any of the rows of ordinary hooks can be lifted when and in the order desired. For example, we may arrange that the twilling hooks are lifted in the order above specified, that is:

' ordinary hooks When the ordinary books I the ordinary hooks the first row are being lifted by the corresponding twilling hooks, the fifth row of can be left down. Likewise, when the ordinary hooks in the fourth row are being similarly lifted, the eighth row of ordinary hooks can be left down; and soon in the following order: seventh row lifted, third row left down second row lifted, sixth row left down-fifth row lifted, first row left downeighth row lifted, fourth row left down third row lifted, seventh row; left down sixth row lifted, second row left down.

Different twilling motions can be'fo btained of'the' primary and by suitable adjustments secondary twilling bars and the corresponding tappet's. In practice, we obtain different twilling or'binding effects firstly by interchanging the twilling. bars according to'the type of twill or binding selected, and thenb'y' slackening the gear wheelson. the ,tappet cylinders and cylinder relatively to each other as we find necessary to make the same agree with the change made in necessary to alter the'arrangement of twilling bars and, when this is so, the only alteration required is the relative adj ustment of the gear wheels and tappet cylinders. ries of holes in the tappet cylinders from the holes shown is required only if the twill in'the design is to be difierent' from that in the ground; The V at any desired twilling hookandmay" follow in any desired order.

The twilling mechanism described provides for separate and complete twilling for warp and weft by raising the rows of ordinary hooks en masse and as required so that loose bindings or floating ends which constitute the chief ordinary self twilling machine are avoided.

vVe claim. i

start of the twill can be made defect in cloth made by an angularly adjusting the two the arrangement of the tw'il llng bars. In some cases','of course, it is not 1. A self twilling jacquard machine having ordinary hooks" arranged in rows, 'grifl'e blades for each of said rows, twilling bars engaging with said grilfe blades, tappet means individual to said said griife blades, twilling hooks, means connected to said twilling hooks for liftingrows of ordinary hooks, twilling blades for each of ordinaryh'ooks arranged' "iii rows, grifi'e' twilling bars for operating j said twilling hooks, secondary twilling bars does not produce the desired binding blades for each of said rows, twilling bars enmeans on said second cylinder adapted to engaging with said grifie blades, a rotatable gage and be angularly adjustable to said first cylinder, pinion means for rotating said mentioned pinion means, and secondary cylinder, tappets on saidcylinder individual tappets on said second cylinder individual to 15 to said twilling bars for operating said grifle said secondary twilling bars for operating blades, tWilling hooks, means connected to said tWilling blades.

said twilling hooks for lifting rows of ordi- In testimony whereof We aflix our signanary hooks, twilling blades for each of said tures. twilling hooks, secondary tWilling bars indi- SAMUEL WALTER DOUGLAS.

10 vidual to and engaging with said twilling JOHN GREGG.

blades, a second rotatable cylinder, pinion MATTHEW SILCOOK. 

